Figeater Beetles: An Unusual Sight in Los Angeles

Los Angeles is currently experiencing an influx of figeater beetles, known scientifically as Cotinis mutabilis. These insects, often referred to as green fruit beetles, are hard to miss due to their large size and distinctive coloration.

Megan Barkdull, an assistant curator of entomology at the Natural History Museum of Los Angeles County, explains that their conspicuous behavior, such as flying into people, is due to their large bodies and relatively small wings. Despite a common misconception, these beetles are not blind and have fully functioning eyes.

According to data from the iNaturalist app, August is peak season for these beetles in Los Angeles. They typically begin appearing in June, with their numbers continuing to grow through July and slowly decreasing in the fall. These beetles, part of the scarab family, feed primarily on soft-skinned fruits such as figs and grapes.

Their population has not only thrived but expanded in recent years. First spotted outside their native Southern California range in Utah in 2009 and in Colorado by 2012, figeater beetles have adapted to changing environments. Factors contributing to their spread include human activities such as creating compost piles, irrigation, and planting fruit trees. Climate change has also made new areas suitable for their habitation.

Karey Windbiel-Rojas from the University of California’s pest management program notes that despite feeding on fruits, figeater beetles are not typically considered pests. They primarily consume decaying fruit and help decompose organic matter, fulfilling an essential ecosystem role.

People sometimes confuse these beetles with Japanese beetles, which are more destructive due to their consumption of plant leaves. Fortunately, Japanese beetles are not prevalent in California, and efforts are made to eliminate them when discovered.

For those encountering figeater beetles indoors, Windbiel-Rojas advises gently releasing them outdoors rather than using pesticides. Her personal encounter at UC Irvine highlights their non-aggressive nature, as demonstrated by her handling one calmly without concern.